Protect the core by stopping the incoming projectiles with the shield. Get Bonus score if you stop a projectile with the same colour on the shield.
Turn and expand your shield as you protect the core from projectiles. Don't stop projectiles with the solid walls as they will be destroyed after a few hits. Get bonus points if you stop a projectile with a matching colour on your shield.
Cost: 0 Jewels
Earn: 0 Jewels